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California State Route 49 - Wikipedia
Wikipedia

California State Route 49

"CA 49" redirects here. For the congressional district, see California's 49th congressional district.

State Route 49 (SR 49) is a north–south state highway in the U.S. state of California that passes through many historic mining communities of the 1849 California gold rush and it is known as the Golden Chain Highway.[2] The highway's creation was lobbied by the Mother Lode Highway Association, a group of locals and historians seeking a single highway to connect many relevant locations along the Gold Rush to honor the 49ers.[3][4][5] One of the bridges along SR 49 is named for the leader of the association, Archie Stevenot.

State Route 49 marker
State Route 49
Golden Chain Highway
Map
SR 49 highlighted in red
Route information
Maintained by Caltrans
Length295.065 mi[1] (474.861 km)
SR 49 has three route breaks, and the length given above does not include the SR 120, SR 20, and SR 89 overlap mileages.
Existed1934–present
Tourist
routes		 Yuba-Donner Scenic Byway
Major junctions
South end SR 41 at Oakhurst
Major intersections
North end SR 70 at Vinton
Location
CountryUnited States
StateCalifornia
CountiesMadera, Mariposa, Tuolumne, Calaveras, Amador, El Dorado, Placer, Nevada, Yuba, Sierra, Plumas
Highway system
← US 48→ US 50

The roadway begins at Oakhurst, Madera County, in the Sierra Nevada, where it diverges from State Route 41. It continues in a generally northwest direction, weaving through the communities of Goldside and Ahwahnee, before crossing into Mariposa County. State Route 49 then continues northward through the counties of Tuolumne, Calaveras, Amador, El Dorado, Placer, Nevada, Yuba, Sierra, and Plumas, where it reaches its northern terminus at State Route 70, in Vinton.

Route description

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SR 49 crossing the American River North/Middle Fork, as seen from Foresthill Bridge (the SR 49 bridge is not visible)
 
The South Fork of the Yuba River as it intersects with SR 49
 
SR 49 in Tuolumne County
 
North end of SR 49, at intersection with SR 70 in Vinton

SR 49 starts at an intersection with SR 41 near Oakhurst. The road heads west before turning north before the town of Ahwahnee near the Wassama Roundhouse State Historic Park. SR 49 continues north, passing through Nipinnswassee before entering Mariposa County and the Sierra National Forest. Continuing to the west, SR 49 passes through Mormon Bar before running concurrently with SR 140 briefly through the town of Mariposa. Near the town of Mount Bullion, SR 49 passes by Mariposa-Yosemite Airport before turning northwest and going through Bear Valley and the intersection with CR J16. The highway passes by the southern edge of Lake McClure and intersects SR 132 in Coulterville before passing into Tuolumne County.[6]

SR 49 continues north through the town of Moccasin, where SR 120 runs concurrently for several miles to the town of Chinese Camp. SR 49 then turns northeast and runs concurrently with SR 108, intersecting CR E5, into the city of Sonora. SR 49 splits from SR 108 and enters downtown Sonora as Stockton Street, turning north onto Washington Street before leaving the Sonora city limits. SR 49 intersects the north end of CR E5 before passing through Tuttletown and crossing into Calaveras County at the bridge over the Stanislaus River.[6]

SR 49 then enters Carson Hill. Passing by New Melones Lake, SR 49 briefly runs concurrently with SR 4 in the city of Angels Camp.[6]

SR 49 continues through Altaville. The highway continues into San Andreas, where SR 12 terminates.[6] SR 49 continues into Mokelumne Hill, where it intersects with SR 26.[6]

SR 49 then passes through Big Bar and across the Mokelumne River, which is located on the county line between Amador County and Calaveras County. SR 49 then runs concurrently with SR 88 briefly through the town of Martell before intersecting the eastern terminus of SR 104.[6] SR 49 then runs west of Sutter Creek and Amador City, via a bypass around those two cities that was constructed in 2009,[7]) before reaching Drytown.[6]

SR 49 then intersects the eastern end of SR 16 before passing through the city of Plymouth. The highway continues through Enterprise before crossing into El Dorado County and passing through the towns of Nashville, El Dorado, and Diamond Springs (the latter two as Pleasant Valley Road) before entering Placerville. SR 49 traverses downtown on Pacific Street and Main Street before continuing onto Spring Street, where it intersects the US 50 expressway at-grade before continuing north as Georgetown Road.[6]

As it leaves the Placerville city limits, SR 49 intersects the southern terminus of SR 193 before continuing northwest as Coloma Road into the town of Coloma. In Coloma, the highway intersects with SR 153, a spur route to the Marshall Gold Discovery State Historic Park. SR 49 then continues through Lotus before turning north at Pilot Hill and intersecting the northern terminus of SR 193 at Cool. SR 49 continues through the Auburn State Recreation Area before crossing into Placer County and entering the city of Auburn as High Street for a very short distance before turning west on Elm Avenue. SR 49 continues onto I-80 west at an interchange for a very short distance until the interchange at exit 119B where SR 49 departs from I-80. SR 49 then continues almost due north out of the Auburn city limits.[6]

SR 49 continues north, crossing into Nevada County and passing through Higgins Corner and Forest Springs. SR 49 becomes a freeway and enters the city of Grass Valley, where it then runs concurrently with SR 20 and interchanges with the northern end of SR 174. The SR 49/SR 20 concurrency continues as a freeway into Nevada City. SR 49 then splits from SR 20 at an at-grade intersection just after the freeway ends heads west out of Nevada City.[6]

SR 49 goes over the South Branch of the Yuba River near the Malakoff Diggins State Historic Park. SR 49 continues through the towns of Sweetland and North San Juan, where it crosses into Yuba County and enters Tahoe National Forest. The route goes through Log Cabin and Camptonville. SR 49 then crosses into Sierra County, where it passes through Goodyears Bar, Downieville, and Sierra City on its forest journey. After passing near Kentucky Mine Historic Park, SR 49 goes through Bassetts and Haskell Creek, then shares a wrong-way concurrency with SR 89 briefly through Sattley and Sierraville. SR 49 then leaves the forest as Loyalton Road, passing through the city of Loyalton and intersecting CR A24 before crossing into Plumas County as Vinton Loyalton Road, where SR 49 ends at SR 70 in the town of Vinton.[6]

SR 49 is part of the California Freeway and Expressway System,[8] and from SR 140 to a point north of SR 88 as well as from I-80 to SR 20 is part of the National Highway System,[9] a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration.[10] SR 49 is eligible to be included in the State Scenic Highway System,[11] and from the Sierra-Yuba county line to Yuba Summit is officially designated as a scenic highway by the California Department of Transportation.[12] The segment of SR 49 from SR 20 in Nevada City to SR 89 in Sierraville also forms part of the Yuba-Donner Scenic Byway, a National Forest Scenic Byway.[13]

SR 49 is known as the Golden Chain Highway for the entire route. SR 49 is known as the John C. Begovich Memorial Highway from Jackson to SR 88 (honoring the California legislator and U.S. Marshal), and the Mother Lode Highway from Sonora to Auburn.[14]

Historical landmarks

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The SR 49 corridor was designed to connect historical locations and landmarks of the California Gold Rush.[3] These include:

Mariposa County
Tuolumne County
  • Jacksonville was the principal river town in 1850 for miners working along the Tuolumne River. The site has since been inundated by Don Pedro Reservoir.[18]
  • Chinese Camp was the headquarters for stagelines and for several California Chinese mining companies in the 1850s.[19]
  • The Wells Fargo Express Company Building in Chinese Camp was built in 1849 and was the home of a general merchandise store.[20]
  • Montezuma, a mining town that flourished after a ditch and flume were completed in 1852, bringing in water for placer mining. The town was nearly destroyed by an incendiary fire in 1866.[21]
  • Jamestown became known as gateway to the Mother Lode and the southern mines. Large quantities of gold were found from nearby Woods Creek.[22]
  • Tuttletown, named after judge A. A. H. Tuttle who settled there 1848, was an early-day stopping place.[23]
Calaveras County
  • Robinson's Ferry was established in 1848 to ferry passengers and freight across the Stanislaus River.[24]
  • The birthplace of Archie Stevenot, who helped found the California State Chamber of Commerce and was officially named "Mr. Mother Lode" by the California legislature in 1961.[25]
  • Carson Hill was one of the most productive mining areas in California. The largest gold nugget in the state was discovered here in 1854, weighing 195 pounds troy.[26]
  • Angels Camp was founded in 1849 and became one of the richest quartz mining sections of the Mother Lode.[27]
  • The Angels Hotel in Angels Camp was originally a canvas tent erected in 1851, replaced by a one-story wooden structure, and then rebuilt with stone in 1855.[28]
  • Altaville was the site of a foundry that was established in 1854. Most of the stamp mills and a large portion of the mining machinery erected in Calaveras and Tuolumne Counties were built at this foundry.[29]
  • The Prince-Garibaldi Building in Altaville was built in 1852, originally housing a general merchandise business.[30]
  • Fourth Crossing became notable in the 1850s for its rich placer ores. The town also served as an important stagecoach and freighting depot, particularly for the southern mines.[31]
  • San Andreas was originally established as a mining camp by Mexican gold miners in 1848. The gold uncovered from the town's underground river channels and placer mines contributed to the Union's success during the American Civil War.[32]
  • Chili Gulch was the richest placer mining section in Calaveras County.[33]
  • Mokelumne Hill was the richest placer mining section of Calaveras County and one of the principal mining towns of California.[34]
  • Big Bar, along the Mokelumne River, was mined in 1848.[35]
Amador County
  • The Butte Store, built in 1857, is the only structure still standing in Butte City.[36]
  • Both Argonaut Mine and adjacent Kennedy Mine were discovered in the 1850s and became the highest-yielding gold mines in the state.[37]
  • Sutter Creek became a boomtown after quartz gold was discovered in the area in 1851.[38]
  • Drytown, founded in 1848, is Amador County's oldest community, and the first in the county in which gold was discovered.[36]
El Dorado County
Placer County
  • Auburn developed into an important mining town, trading post, and stage terminal after gold was discovered nearby in 1848.[45]
Nevada County
  • The former Overland Emigrant Trail, which was used by travelers from points east to the California gold fields, crosses the present day SR 49 near Wolf Creek.[46]
  • Empire Mine was in constant operation from 1850 to the late 1950s.[47]
  • Gold Hill in Grass Valley was the site of one of the first discoveries of quartz gold in California.[48]

Major intersections

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Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment that existed at the time, and do not necessarily reflect current mileage. R reflects a realignment in the route since then, M indicates a second realignment, L refers to an overlap due to a correction or change, and T indicates postmiles classified as temporary (for a full list of prefixes, see California postmile § Official postmile definitions).[1] Segments that remain unconstructed or have been relinquished to local control may be omitted. The numbers reset at county lines; the start and end postmiles in each county are given in the county column.

CountyLocationPostmile
[1][49][50]		Exit
[51]		DestinationsNotes
Madera
MAD 0.00-9.28		Oakhurst0.00  SR 41 – Yosemite, FresnoSouthern terminus
Mariposa
MPA 0.33-48.84		Mariposa18.50
21.22[N 1]		 
  SR 140 west – Merced		South end of SR 140 overlap
22.00[N 1]
18.51		 
  SR 140 east / Jones Street – Yosemite		North end of SR 140 overlap
Bear Valley29.45  CR J16 (Bear Valley Road) – Hornitos, SnellingEastern terminus of CR J16
Coulterville44.67 
  SR 132 west – La Grange, Modesto		Eastern terminus of SR 132
44.70  CR J132 (Greeley Hill Road) – Greeley Hill, Yosemite National ParkWestern terminus of CR J132
Tuolumne
TUO 0.00-R27.52		MoccasinR6.47
R23.90[N 2]		 
  SR 120 east – Yosemite		South end of SR 120 overlap
Tuolumne River / Don Pedro ReservoirR19.61[N 2]James E. Roberts Bridge
Chinese Camp15.52[N 2]
R8.78		 
  SR 120 west – Oakdale		North end of SR 120 overlap
​R11.59 
  SR 108 west – Modesto		South end of SR 108 overlap
Jamestown14.74  CR J5 (Rawhide Road) / Humbug StreetSouthern terminus of CR J5
Sonora16.48 
  SR 108 Bus. begins / SR 108 east – Pinecrest		North end of SR 108 overlap; south end of SR 108 Bus. overlap
17.97Washington Street (SR 108 Bus. east) – Sonora Pass, Twain HarteFormer SR 108 east; north end of SR 108 Bus. overlap
Columbia20.41  CR E18 (Parrotts Ferry Road) – ColumbiaSouthern terminus of CR E18
Tuttletown23.71  CR J5 (Rawhide Road) – JamestownNorthern terminus of CR J5
New Melones LakeR27.52
0.00		Archie Stevenot Bridge
Calaveras
CAL R0.00-30.87		Angels Camp7.21 
  Vallecito Road (SR 4 Bus. east) to SR 4 – Murphys, Arnold, Bear Valley, Markleeville		South end of SR 4 Bus. overlap; former SR 4 east
8.67  SR 4 Bus. ends / SR 4 – Murphys, StocktonNorth end of SR 4 Bus. overlap
San Andreas19.41 
 
  Historic SR 49 north (Main Street)		Former SR 49 north
R20.50 
  SR 12 west – Valley Springs, Stockton		Eastern terminus of SR 12
​R22.21 
 
  Historic SR 49 south (Gold Strike Road)		Former SR 49 south
Mokelumne Hill27.61  SR 26 – Valley Springs, West Point
North Fork Mokelumne River30.87
0.00		Mokelumne River Bridge
Amador
AMA 0.00-22.12		Jackson4.03 
  SR 88 east – Pine Grove, Lake Tahoe		South end of SR 88 overlap
Martell5.93 
  SR 88 west – Stockton		North end of SR 88 overlap
Sutter Creek6.98  SR 104 (Ridge Road)Eastern terminus of SR 104
R7.30Old Route 49 north / Valley View Drive – Sutter Creek, Amador CitySR 49 bypass was constructed around Sutter Creek and Amador City in 2009
​R10.76Old Route 49 south – Amador City, Sutter Creek
Central House14.72 
  SR 16 west – Sacramento		Eastern terminus of SR 16
Plymouth17.22  CR E16 (Shenandoah Road) / Main Street – Fiddletown, River PinesRoundabout; southern terminus of CR E16
Cosumnes River22.12
0.00		Cosumnes River Bridge
El Dorado
ED 0.00-38.23		Placerville14.90  US 50 – Lake Tahoe, Sacramento
15.69 
  SR 193 north – Georgetown		Eastern terminus of SR 193
Coloma22.87Cold Springs Road (SR 153) – Gold HillEastern terminus of SR 153
Cool34.47 
  SR 193 east – Greenwood, Georgetown		South end of SR 193 overlap
North Fork American River38.23
0.00		Tall Green Bridge
Placer
PLA 0.00-11.37		Auburn2.36 
  Historic US 40 east (Lincoln Way) / Borland Avenue		South end of Hist. US 40 overlap
2.52High Street south (Historic US 40 west) / Elm Avenue eastNorth end of Hist. US 40 overlap; former SR 49 north
R2.74
17.83[N 3]		 
  I-80 east / Elm Avenue west – Reno		Interchange; south end of I-80 overlap; I-80 exit 119C
South end of freeway on SR 49
17.54[N 3]
3.21		North end of freeway on SR 49
 
  I-80 west (SR 193 west) / Grass Valley Highway to Lincoln Way – Sacramento		Interchange; north end of I-80 / SR 193 overlap; Grass Valley Highway is former SR 49 south; I-80 exit 119B
North Auburn6.38 
  Bell Road to I-80 – Auburn Municipal Airport, Reno, Sacramento
Bear River11.37
0.00		Bear River Bridge
Nevada
NEV 0.00-R32.64		Grass ValleyR13.66South end of freeway
—McKnight Way / South Auburn Street
R14.48
R12.30[N 4]		— 
  SR 20 west / Empire Street – Marysville		South end of SR 20 overlap
R12.92[N 4]182A  SR 174 – Colfax, Grass ValleyExit numbers based on SR 20 mileage; northern terminus of SR 174
R13.61[N 4]182BIdaho Maryland RoadNorthbound signage
East Main StreetSouthbound signage
R14.27[N 4]183ADorsey Drive
R14.80[N 4]183BBrunswick Road
Nevada CityR15.92[N 4]185AGold Flat Road / Ridge RoadSigned as exit 185 southbound
R16.74[N 4]185BSacramento Street – Nevada CityNorthbound exit and southbound entrance
R16.99[N 4]186Broad StreetNorthbound exit and southbound entrance
R17.24[N 4]Coyote Street – Historical DistrictNo northbound exit
North end of freeway
R17.40[N 4]
15.06		 
  SR 20 east / Uren Street – Truckee		North end of SR 20 overlap
Yuba RiverR32.64
0.00		Yuba River Bridge
Yuba
YUB 0.00-9.37		​3.59  CR E20 (Marysville Road) – DobbinsEastern terminus of CR E20; serves Bullards Bar Reservoir
Sierra
SIE 0.00-64.05		​41.19[52]Yuba Pass, elevation 6,701 feet (2,042 m)[52]
​47.44
19.96[N 5]		 
  SR 89 north – Calpine, Graeagle, Blairsden, Quincy		West end of SR 89 overlap
Sattley19.05  CR A23 (Westside Road) – Beckwourth, PortolaSouthern terminus of CR A23
Sierraville15.06[N 5]
47.45		 
  SR 89 south (Lincoln Street) – Truckee		East end of SR 89 overlap
Loyalton60.65  CR A24 (Third Street)Southern terminus of CR A24
Plumas
PLU 0.00-7.50		Vinton7.50  SR 70 – Beckwourth, Quincy, RenoNorthern terminus; former SR 24 / US 40 Alt.
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
  1. ^ a b Indicates that the postmile represents the distance along SR 140 rather than SR 49.
  2. ^ a b c Indicates that the postmile represents the distance along SR 120 rather than SR 49.
  3. ^ a b Indicates that the postmile represents the distance along I-80 rather than SR 49.
  4. ^ a b c d e f g h i j Indicates that the postmile represents the distance along SR 20 rather than SR 49.
  5. ^ a b Indicates that the postmile represents the distance along SR 89 rather than SR 49.

See also

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References

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  1. ^ a b c California Department of Transportation. "State Truck Route List". Sacramento: California Department of Transportation. Archived from the original (XLS file) on September 5, 2015. Retrieved June 30, 2015.
  2. ^ "Golden Chain Highway". Visit California. Retrieved 2024-03-06.
  3. ^ a b "Mother Lode Highway Is Boosted By Association". Riverside Daily Press. Vol. XXXVII, no. 98. December 16, 1922.
  4. ^ Archie D. Stevenot "Mr. Mother Lode". Near Angels Camp, California: Golden Chain Council of the Mother Lode and Grand Council of E Clampus Vitus. July 23, 1976. Retrieved January 23, 2023.
  5. ^ Barton, Robert M. "New Bridges - Modern Structures Built on Route Traveled by 49ers" (PDF). California Highways and Public Works. Vol. 32, no. 1–2. p. 15.
  6. ^ a b c d e f g h i j k California Road Atlas (Map). Thomas Brothers. 2008.
  7. ^ "Amador Celebrates New Bypass".
  8. ^ "Article 2 of Chapter 2 of Division 1". California Streets and Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
  9. ^ Federal Highway Administration (March 25, 2015). National Highway System: California (North) (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved October 14, 2017.
  10. ^ Natzke, Stefan; Neathery, Mike & Adderly, Kevin (June 20, 2012). "What is the National Highway System?". National Highway System. Washington, DC: Federal Highway Administration. Retrieved July 1, 2012.
  11. ^ "Article 2.5 of Chapter 2 of Division 1". California Streets & Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
  12. ^ California Department of Transportation (August 2019). "Officially Designated State Scenic Highways and Historic Parkways" (XLSX). Sacramento: California Department of Transportation. Retrieved October 14, 2017.
  13. ^ Federal Highway Administration (n.d.). "Yuba-Donner Scenic Byway". America's Byways. Federal Highway Administration. Archived from the original on October 23, 2011. Retrieved October 23, 2011.
  14. ^ California Department of Transportation; California State Transportation Agency (January 2021). 2020 Named Freeways, Highways, Structures and Other Appurtenances in California (PDF). Sacramento: California Department of Transportation. pp. 37, 38, 228, 268. Archived from the original (PDF) on October 10, 2022.
  15. ^ "Mormon Bar". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  16. ^ "Bear Valley". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  17. ^ "Coulterville". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  18. ^ "China Camp". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  19. ^ "Chinese Camp". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  20. ^ "Wells Fargo Express Company Building". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  21. ^ "Montezuma". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  22. ^ "Jamestown". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  23. ^ "Tuttletown". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  24. ^ "Robinson's Ferry". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  25. ^ "Birthplace of Archie Stevenot". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  26. ^ "Carson Hill". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  27. ^ "Angels Camp". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  28. ^ "Angels Hotel". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  29. ^ "Altaville". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  30. ^ "Prince-Garibaldi Building". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  31. ^ "Fourth Crossing". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  32. ^ "San Andreas". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  33. ^ "Chili Gulch". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  34. ^ "Mokelumne Hill". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  35. ^ "California Historical Landmarks in Calaveras County". Office of Historic Preservation. California State Parks. Retrieved February 28, 2023.
  36. ^ a b "California Historical Landmarks in Amador County". Office of Historic Preservation. California State Parks. Retrieved February 28, 2023.
  37. ^ "Argonaut Mine and Kennedy Mine". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  38. ^ "Sutter Creek". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  39. ^ "El Dorado". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  40. ^ "Diamond Springs Dorado". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  41. ^ "Placerville". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  42. ^ "Marshall Monument". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  43. ^ "Gold Discovery Site". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  44. ^ "Coloma Road-Coloma". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  45. ^ "Auburn". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  46. ^ "Overland Emigrant Trail". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  47. ^ "Empire Mine". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  48. ^ "Site of One of the First Discoveries of Quartz Gold in California". Office of Historic Preservation, California State Parks. Retrieved February 28, 2023.
  49. ^ California Department of Transportation (July 2007). "Log of Bridges on State Highways". Sacramento: California Department of Transportation.
  50. ^ California Department of Transportation, All Traffic Volumes on CSHS, 2005 and 2006
  51. ^ California Department of Transportation, California Numbered Exit Uniform System, State Route 20 Freeway Interchanges, Retrieved on 2009-02-05.
  52. ^ a b "Elevation and Location of Summits and Passes in California". California Department of Transportation. Archived from the original on March 1, 2017.
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